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Old 03-11-2012, 06:59 PM   #1
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88 chevy P30 brake caliper not releasing

can anyone help!! i have an 88 motorhome and the front left caliper is sticking. i have replaced the calipers, pads and rubber brake lines and now i am stumped.

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Old 03-11-2012, 07:03 PM   #2
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I had the same problem after changes the pads. Check your brake line, it is probably bent and restricting the flow.

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Old 03-11-2012, 08:06 PM   #3
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Did you check to make sure the caliper slid with ease when you installed it?
Sometimes rust accumulates and causes it to stick. The common problem I found was with the brake hose breaking down inside creating a "Check valve" effect.
You said that you replaced the hose, so check to see if the mount bracket on the new hose is crimped too tight thus restricting back flow.

Let us know what you find.
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Old 03-11-2012, 08:07 PM   #4
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When the previous owner of my 87 Allegro had the brakes done he didn't do the brake lines. Mine froze up and locked up. The issue was the brake lines. They had to all be redone. Do it all and your problem will go away. I didn't have an issue last year in 3000 miles of driving
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Old 03-12-2012, 07:25 AM   #5
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Originally Posted by awarnes View Post
When the previous owner of my 87 Allegro had the brakes done he didn't do the brake lines. Mine froze up and locked up. The issue was the brake lines. They had to all be redone. Do it all and your problem will go away. I didn't have an issue last year in 3000 miles of driving
He is right. The problem is the rubber hose at the caliper. The middle section has a clamp that attaches the hose to the frame. As the hose ages it swells and the clamp will not let it expand out. The hose swells shut and stops the flow of fluid. When you put on brakes the power steering pump pressure applies the brakes, but when you let off the brakes the hose holds the pressure on.
I have changed dozens of these. This is a common problem with Chevy.
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Old 03-12-2012, 09:00 AM   #6
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X 2 on chevy hose

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